National Toxicology Program

National Toxicology Program
https://ntp.niehs.nih.gov/go/14629

TDMS Study 96020-01 Pathology Tables

NTP                                    STATISTICAL ANALYSIS OF NON-NEOPLASTIC LESIONS                          REPORT: PEIRPT10     
LAB: Battelle Columbus                      TEF EVALUATION (BINARY MIXTURE; PCB 126/PCB 153)                   DATE: 03/03/04       
EXPERIMENT: 96020 TEST: 01                                                                                     TIME: 14:09:40       
TEST TYPE:  CHRONIC                             CAGES FROM 0000 TO LAST CAGE                                   PAGE:       1        
CONT: NO1-ES-75411                              ROUTE: GAVAGE                                                  NTP C#: C96020       
PATHOLOGIST: SELLS, DONALD                                                                                     CAS: TEFBINARYMIX    
------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                                    
                                                       53 WEEK SSAC FINAL #1                                                        
                                                                                                                                    
                                                                                                                                    
               REASONS FOR REMOVAL:    25017 Scheduled Sacrifice                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
                                                                                                                                    
               REMOVAL DATE RANGE:     091699 091799                                                                                
                                                                                                                                    
               TREATMENT GROUPS:       INCLUDE 001    0 NG /  0 UG                                                                  
                                       INCLUDE 004    300 NG /100 UG                                                                
                                       INCLUDE 005    300 NG /300 UG                                                                
                                       INCLUDE 006    300 NG /3000 UG                                                               
                                                                                                                                   
NTP                                    STATISTICAL ANALYSIS OF NON-NEOPLASTIC LESIONS                          REPORT: PEIRPT10     
LAB: Battelle Columbus                      TEF EVALUATION (BINARY MIXTURE; PCB 126/PCB 153)                   DATE: 03/03/04       
EXPERIMENT: 96020 TEST: 01                                                                                     TIME: 14:09:40       
TEST TYPE:  CHRONIC                             CAGES FROM 0000 TO LAST CAGE                                                        
CONT: NO1-ES-75411                              ROUTE: GAVAGE                                                  NTP C#: C96020       
PATHOLOGIST: SELLS, DONALD                                                                                     CAS: TEFBINARYMIX    
                                                                                                                                    
                                                                                                                                    
SUMMARY OF STATISTICALLY SIGNIFICANT (P<=.05) RESULTS                                                                               
IN THE ANALYSIS OF    TEF EVALUATION (BINARY MIXTURE; PCB 126                                                                       
===============================================================                                                                     
Female Rats                                                                                                                         
------------                                                                                                                        
Organ                                  Morphology                                                                                   
-----                                  ----------                                                                                   
Liver                                  Fatty Change Diffuse                                                                         
                                       Pigmentation                                                                                 
                                       Toxic Hepatopathy                                                                            
Liver: Bile Duct                       Hyperplasia                                                                                  
Liver: Hepatocyte                      Hypertrophy                                                                                  
                                       Multinucleated                                                                               
Lung                                   Infiltration Cellular Histiocyte                                                             
Lung: Alveolar Epithelium              Metaplasia Bronchiolar                                                                       
Mammary Gland                          Hyperplasia                                                                                  
Pancreas: Acinus                       Vacuolization Cytoplasmic                                                                    
Thymus                                 Atrophy                                                                                      
Thyroid Gland: C-Cell                  Hyperplasia                                                                                  
Thyroid Gland: Follicular Cell         Hypertrophy                                                                                  
Uterus                                 Inflammation                                                                                 
Uterus: Endometrium                    Hyperplasia Cystic                                                                           
===============================================================                                                                     
                                                                                                                                   
       Date:  03/03/04                           EXPERIMENT: 96020 TEST: 01                                            Page 1       
Statistical Analysis of Non-neoplastic Lesions in        Rats(SPRAGUE-DAWLEY)  -     TEF EVALUATION (BINARY MIXTURE; PCB 126        
                                         Terminal Sacrifice at 143 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Adrenal Cortex                                                                                                                   | 
|     Degeneration Cystic                                                                                                         | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  2/8 (25%)                1/10 (10%)               1/8 (13%)                1/9 (11%)       | 
|POLY-3 RATE (b)    |                  2/2.30                   1/1.44                   1/1.34                   1/1.39          | 
|POLY-3 PERCENT (g) |                  87.1%                    69.3%                    74.4%                    71.8%           | 
|INT SACRIFICE 1 (c)|                  2/8 (25%)                1/10 (10%)               1/8 (12.5%)              1/9 (11.1%)     | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  366 (I)                  366 (I)                  366 (I)                  366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.561N                 P=0.418N                 P=0.500N                 P=0.457N        | 
|POLY 3             |                  P=0.394N                 P=0.240N                 P=0.314N                 P=0.274N        | 
|POLY 1.5           |                  P=0.424N                 P=0.273N                 P=0.348N                 P=0.308N        | 
|POLY 6             |                  P=0.386N                 P=0.231N                 P=0.304N                 P=0.264N        | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.562N                 P=0.412N                 P=0.500N                 P=0.453N        | 
|ORDER RESTRICTED   |                  P=0.413N                 (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Adrenal Cortex                                                                                                                   | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  1/8 (13%)                3/10 (30%)               1/8 (13%)                1/9 (11%)       | 
|POLY-3 RATE (b)    |                  1/1.34                   3/3.34                   1/1.34                   1/1.39          | 
|POLY-3 PERCENT (g) |                  74.4%                    89.7%                    74.4%                    71.8%           | 
|INT SACRIFICE 1 (c)|                  1/8 (12.5%)              3/10 (30%)               1/8 (12.5%)              1/9 (11.1%)     | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  366 (I)                  366 (I)                  366 (I)                  366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.463N                 P=0.379                  P=0.768                  P=0.741N        | 
|POLY 3             |                  P=0.315N                 P=0.228                  P=0.548                  P=0.513N        | 
|POLY 1.5           |                  P=0.341N                 P=0.255                  P=0.590                  P=0.556N        | 
|POLY 6             |                  P=0.308N                 P=0.220                  P=0.536                  P=0.501N        | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.463N                 P=0.382                  P=0.767N                 P=0.735N        | 
|ORDER RESTRICTED   |                  P=0.491N                 (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
                                                                                                                                   
       Date:  03/03/04                           EXPERIMENT: 96020 TEST: 01                                            Page 2       
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -     TEF EVALUATION (BINARY MIXTURE; PCB 126         
                                         Terminal Sacrifice at 143 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Adrenal Cortex                                                                                                                   | 
|     Hypertrophy                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  4/8 (50%)                5/10 (50%)               5/8 (63%)                3/9 (33%)       | 
|POLY-3 RATE (b)    |                  4/4.20                   5/5.25                   5/5.15                   3/3.30          | 
|POLY-3 PERCENT (g) |                  95.3%                    95.3%                    97.1%                    91.1%           | 
|INT SACRIFICE 1 (c)|                  4/8 (50%)                5/10 (50%)               5/8 (62.5%)              3/9 (33.3%)     | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  366 (I)                  366 (I)                  366 (I)                  366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.261N                 P=0.678                  P=0.500                  P=0.422N        | 
|POLY 3             |                  P=0.201N                 P=0.593                  P=0.420                  P=0.321N        | 
|POLY 1.5           |                  P=0.213N                 P=0.608N                 P=0.435                  P=0.340N        | 
|POLY 6             |                  P=0.198N                 P=0.590N                 P=0.417                  P=0.317N        | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.258N                 P=0.681N                 P=0.500                  P=0.419N        | 
|ORDER RESTRICTED   |                  P=0.306N                 (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver                                                                                                                            | 
|     Eosinophilic Focus                                                                                                          | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  0/8 (0%)                 2/10 (20%)               1/8 (13%)                1/9 (11%)       | 
|POLY-3 RATE (b)    |                  0/0.39                   2/2.39                   1/1.34                   1/1.39          | 
|POLY-3 PERCENT (g) |                  0.0%                     83.6%                    74.4%                    71.8%           | 
|INT SACRIFICE 1 (c)|                  0/8 (0%)                 2/10 (20%)               1/8 (12.5%)              1/9 (11.1%)     | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  ---                      366 (I)                  366 (I)                  366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.709                  P=0.284                  P=0.500                  P=0.523         | 
|POLY 3             |                  P=0.531                  P=0.098                  P=0.173                  P=0.189         | 
|POLY 1.5           |                  P=0.564                  P=0.127                  P=0.228                  P=0.245         | 
|POLY 6             |                  P=0.522                  P=0.092                  P=0.159                  P=0.174         | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.712                  P=0.294                  P=0.500                  P=0.529         | 
|ORDER RESTRICTED   |                  P=0.260                  (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
                                                                                                                                   
       Date:  03/03/04                           EXPERIMENT: 96020 TEST: 01                                            Page 3       
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -     TEF EVALUATION (BINARY MIXTURE; PCB 126         
                                         Terminal Sacrifice at 143 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver                                                                                                                            | 
|     Fatty Change Diffuse                                                                                                        | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  0/8 (0%)                 1/10 (10%)               3/8 (38%)                9/9 (100%)      | 
|POLY-3 RATE (b)    |                  0/0.39                   1/1.44                   3/3.25                   9/9.00          | 
|POLY-3 PERCENT (g) |                  0.0%                     69.3%                    92.4%                    100.0%          | 
|INT SACRIFICE 1 (c)|                  0/8 (0%)                 1/10 (10%)               3/8 (37.5%)              9/9 (100%)      | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  ---                      366 (I)                  366 (I)                  366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P<0.001 **               P=0.545                  P=0.107                  P<0.001 **      | 
|POLY 3             |                  P<0.001 **               P=0.203                  P=0.022 *                P<0.001 **      | 
|POLY 1.5           |                  P<0.001 **               P=0.260                  P=0.031 *                P<0.001 **      | 
|POLY 6             |                  P<0.001 **               P=0.188                  P=0.020 *                P<0.001 **      | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P<0.001 **               P=0.556                  P=0.100                  P<0.001 **      | 
|ORDER RESTRICTED   |                  P<0.001 **               (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver                                                                                                                            | 
|     Inflammation                                                                                                                | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  8/8 (100%)               10/10 (100%)             8/8 (100%)               9/9 (100%)      | 
|POLY-3 RATE (b)    |                  8/8.00                   10/10.00                 8/8.00                   9/9.00          | 
|POLY-3 PERCENT (g) |                  100.0%                   100.0%                   100.0%                   100.0%          | 
|INT SACRIFICE 1 (c)|                  8/8 (100%)               10/10 (100%)             8/8 (100%)               9/9 (100%)      | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  366 (I)                  366 (I)                  366 (I)                  366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  (e)                      (e)                      (e)                      (e)             | 
|POLY 3             |                  (e)                      (e)                      (e)                      (e)             | 
|POLY 1.5           |                  (e)                      (e)                      (e)                      (e)             | 
|POLY 6             |                  (e)                      (e)                      (e)                      (e)             | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  (e)                      (e)                      (e)                      (e)             | 
|ORDER RESTRICTED   |                  (e)                      (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
                                                                                                                                   
       Date:  03/03/04                           EXPERIMENT: 96020 TEST: 01                                            Page 4       
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -     TEF EVALUATION (BINARY MIXTURE; PCB 126         
                                         Terminal Sacrifice at 143 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver                                                                                                                            | 
|     Mixed Cell Focus                                                                                                            | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  5/8 (63%)                9/10 (90%)               2/8 (25%)                6/9 (67%)       | 
|POLY-3 RATE (b)    |                  5/5.15                   9/9.05                   2/2.30                   6/6.15          | 
|POLY-3 PERCENT (g) |                  97.1%                    99.5%                    87.1%                    97.6%           | 
|INT SACRIFICE 1 (c)|                  5/8 (62.5%)              9/10 (90%)               2/8 (25%)                6/9 (66.7%)     | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  366 (I)                  366 (I)                  366 (I)                  366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.604                  P=0.212                  P=0.165N                 P=0.625         | 
|POLY 3             |                  P=0.552                  P=0.164                  P=0.089N                 P=0.560         | 
|POLY 1.5           |                  P=0.563                  P=0.172                  P=0.101N                 P=0.571         | 
|POLY 6             |                  P=0.551                  P=0.162                  P=0.085N                 P=0.557         | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      P=0.629         | 
|COCH-ARM / FISHERS |                  P=0.605                  P=0.206                  P=0.157N                 P=0.627         | 
|ORDER RESTRICTED   |                  P=0.103N                 (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver                                                                                                                            | 
|     Pigmentation                                                                                                                | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  0/8 (0%)                 10/10 (100%)             8/8 (100%)               9/9 (100%)      | 
|POLY-3 RATE (b)    |                  0/0.39                   10/10.00                 8/8.00                   9/9.00          | 
|POLY-3 PERCENT (g) |                  0.0%                     100.0%                   100.0%                   100.0%          | 
|INT SACRIFICE 1 (c)|                  0/8 (0%)                 10/10 (100%)             8/8 (100%)               9/9 (100%)      | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  ---                      366 (I)                  366 (I)                  366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.039 *                P<0.001 **               P<0.001 **               P<0.001 **      | 
|POLY 3             |                  P=0.037N*                P<0.001 **               P<0.001 **               P<0.001N**      | 
|POLY 1.5           |                  P=0.037N*                P<0.001 **               P<0.001 **               P<0.001N**      | 
|POLY 6             |                  P=0.037N*                P<0.001 **               P<0.001 **               P<0.001N**      | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.037 *                P<0.001 **               P<0.001 **               P<0.001 **      | 
|ORDER RESTRICTED   |                  P<0.001 **               (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
                                                                                                                                   
       Date:  03/03/04                           EXPERIMENT: 96020 TEST: 01                                            Page 5       
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -     TEF EVALUATION (BINARY MIXTURE; PCB 126         
                                         Terminal Sacrifice at 143 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver                                                                                                                            | 
|     Toxic Hepatopathy                                                                                                           | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  0/8 (0%)                 3/10 (30%)               0/8 (0%)                 6/9 (67%)       | 
|POLY-3 RATE (b)    |                  0/0.39                   3/3.34                   0/0.39                   6/6.15          | 
|POLY-3 PERCENT (g) |                  0.0%                     89.7%                    0.0%                     97.6%           | 
|INT SACRIFICE 1 (c)|                  0/8 (0%)                 3/10 (30%)               0/8 (0%)                 6/9 (66.7%)     | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  ---                      366 (I)                  ---                      366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.003 **               P=0.151                  (e)                      P=0.011 *       | 
|POLY 3             |                  P<0.001 **               P=0.044 *                (e)                      P<0.001 **      | 
|POLY 1.5           |                  P<0.001 **               P=0.058                  (e)                      P<0.001 **      | 
|POLY 6             |                  P<0.001 **               P=0.041 *                (e)                      P<0.001 **      | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.002 **               P=0.147                  (e)                      P=0.007 **      | 
|ORDER RESTRICTED   |                  P=0.027 *                (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver: Bile Duct                                                                                                                 | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  0/8 (0%)                 2/10 (20%)               0/8 (0%)                 5/9 (56%)       | 
|POLY-3 RATE (b)    |                  0/0.39                   2/2.39                   0/0.39                   5/5.20          | 
|POLY-3 PERCENT (g) |                  0.0%                     83.6%                    0.0%                     96.2%           | 
|INT SACRIFICE 1 (c)|                  0/8 (0%)                 2/10 (20%)               0/8 (0%)                 5/9 (55.6%)     | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  ---                      366 (I)                  ---                      366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.005 **               P=0.284                  (e)                      P=0.028 *       | 
|POLY 3             |                  P<0.001 **               P=0.098                  (e)                      P=0.002 **      | 
|POLY 1.5           |                  P<0.001 **               P=0.127                  (e)                      P=0.003 **      | 
|POLY 6             |                  P<0.001 **               P=0.092                  (e)                      P<0.001 **      | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.005 **               P=0.294                  (e)                      P=0.020 *       | 
|ORDER RESTRICTED   |                  P=0.061                  (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
                                                                                                                                   
       Date:  03/03/04                           EXPERIMENT: 96020 TEST: 01                                            Page 6       
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -     TEF EVALUATION (BINARY MIXTURE; PCB 126         
                                         Terminal Sacrifice at 143 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver: Hepatocyte                                                                                                                | 
|     Hypertrophy                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  0/8 (0%)                 10/10 (100%)             8/8 (100%)               9/9 (100%)      | 
|POLY-3 RATE (b)    |                  0/0.39                   10/10.00                 8/8.00                   9/9.00          | 
|POLY-3 PERCENT (g) |                  0.0%                     100.0%                   100.0%                   100.0%          | 
|INT SACRIFICE 1 (c)|                  0/8 (0%)                 10/10 (100%)             8/8 (100%)               9/9 (100%)      | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  ---                      366 (I)                  366 (I)                  366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.039 *                P<0.001 **               P<0.001 **               P<0.001 **      | 
|POLY 3             |                  P=0.037N*                P<0.001N**               P<0.001N**               P<0.001N**      | 
|POLY 1.5           |                  P=0.037N*                P<0.001N**               P<0.001N**               P<0.001N**      | 
|POLY 6             |                  P=0.037N*                P<0.001N**               P<0.001N**               P<0.001N**      | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.037 *                P<0.001 **               P<0.001 **               P<0.001 **      | 
|ORDER RESTRICTED   |                  P<0.001 **               (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver: Hepatocyte                                                                                                                | 
|     Multinucleated                                                                                                              | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  0/8 (0%)                 3/10 (30%)               2/8 (25%)                7/9 (78%)       | 
|POLY-3 RATE (b)    |                  0/0.39                   3/3.34                   2/2.30                   7/7.10          | 
|POLY-3 PERCENT (g) |                  0.0%                     89.7%                    87.1%                    98.6%           | 
|INT SACRIFICE 1 (c)|                  0/8 (0%)                 3/10 (30%)               2/8 (25%)                7/9 (77.8%)     | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  ---                      366 (I)                  366 (I)                  366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.002 **               P=0.151                  P=0.232                  P=0.004 **      | 
|POLY 3             |                  P<0.001 **               P=0.044 *                P=0.069                  P<0.001 **      | 
|POLY 1.5           |                  P<0.001 **               P=0.058                  P=0.093                  P<0.001 **      | 
|POLY 6             |                  P<0.001 **               P=0.041 *                P=0.064                  P<0.001 **      | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.002 **               P=0.147                  P=0.233                  P=0.002 **      | 
|ORDER RESTRICTED   |                  P=0.011 *                (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
                                                                                                                                   
       Date:  03/03/04                           EXPERIMENT: 96020 TEST: 01                                            Page 7       
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -     TEF EVALUATION (BINARY MIXTURE; PCB 126         
                                         Terminal Sacrifice at 143 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Liver: Oval Cell                                                                                                                 | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  0/8 (0%)                 1/10 (10%)               0/8 (0%)                 2/9 (22%)       | 
|POLY-3 RATE (b)    |                  0/0.39                   1/1.44                   0/0.39                   2/2.34          | 
|POLY-3 PERCENT (g) |                  0.0%                     69.3%                    0.0%                     85.3%           | 
|INT SACRIFICE 1 (c)|                  0/8 (0%)                 1/10 (10%)               0/8 (0%)                 2/9 (22.2%)     | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  ---                      366 (I)                  ---                      366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.155                  P=0.545                  (e)                      P=0.259         | 
|POLY 3             |                  P=0.056                  P=0.203                  (e)                      P=0.084         | 
|POLY 1.5           |                  P=0.072                  P=0.260                  (e)                      P=0.111         | 
|POLY 6             |                  P=0.054                  P=0.188                  (e)                      P=0.078         | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.152                  P=0.556                  (e)                      P=0.265         | 
|ORDER RESTRICTED   |                  P=0.230                  (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Lung                                                                                                                             | 
|     Infiltration Cellular Histiocyte                                                                                            | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  4/8 (50%)                0/10 (0%)                2/8 (25%)                4/9 (44%)       | 
|POLY-3 RATE (b)    |                  4/4.20                   0/0.49                   2/2.30                   4/4.25          | 
|POLY-3 PERCENT (g) |                  95.3%                    0.0%                     87.1%                    94.2%           | 
|INT SACRIFICE 1 (c)|                  4/8 (50%)                0/10 (0%)                2/8 (25%)                4/9 (44.4%)     | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  366 (I)                  ---                      366 (I)                  366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.226                  P=0.028N*                P=0.309N                 P=0.599N        | 
|POLY 3             |                  P=0.147                  P=0.002N**               P=0.204N                 P=0.506N        | 
|POLY 1.5           |                  P=0.158                  P=0.003N**               P=0.224N                 P=0.522N        | 
|POLY 6             |                  P=0.145                  P<0.001N**               P=0.199N                 P=0.502N        | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.223                  P=0.023N*                P=0.304N                 P=0.601N        | 
|ORDER RESTRICTED   |                  P=0.095N                 (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
                                                                                                                                   
       Date:  03/03/04                           EXPERIMENT: 96020 TEST: 01                                            Page 8       
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -     TEF EVALUATION (BINARY MIXTURE; PCB 126         
                                         Terminal Sacrifice at 143 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Lung: Alveolar Epithelium                                                                                                        | 
|     Metaplasia Bronchiolar                                                                                                      | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  0/8 (0%)                 3/10 (30%)               1/8 (13%)                0/9 (0%)        | 
|POLY-3 RATE (b)    |                  0/0.39                   3/3.34                   1/1.34                   0/0.44          | 
|POLY-3 PERCENT (g) |                  0.0%                     89.7%                    74.4%                    0.0%            | 
|INT SACRIFICE 1 (c)|                  0/8 (0%)                 3/10 (30%)               1/8 (12.5%)              0/9 (0%)        | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  ---                      366 (I)                  366 (I)                  ---             | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.263N                 P=0.151                  P=0.500                  (e)             | 
|POLY 3             |                  P=0.111N                 P=0.044 *                P=0.173                  (e)             | 
|POLY 1.5           |                  P=0.133N                 P=0.058                  P=0.228                  (e)             | 
|POLY 6             |                  P=0.107N                 P=0.041 *                P=0.159                  (e)             | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.260N                 P=0.147                  P=0.500                  (e)             | 
|ORDER RESTRICTED   |                  P=0.322N                 (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Mammary Gland                                                                                                                    | 
|     Cyst                                                                                                                        | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  1/8 (13%)                0/2 (0%)                 2/5 (40%)                0/9 (0%)        | 
|POLY-3 RATE (b)    |                  1/1.34                   0/0.10                   2/2.15                   0/0.44          | 
|POLY-3 PERCENT (g) |                  74.4%                    0.0%                     93.1%                    0.0%            | 
|INT SACRIFICE 1 (c)|                  1/8 (12.5%)              0/2 (0%)                 2/5 (40%)                0/9 (0%)        | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  366 (I)                  ---                      366 (I)                  ---             | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.240N                 P=0.773N                 P=0.326                  P=0.477N        | 
|POLY 3             |                  P=0.093N                 P=0.339N                 P=0.167                  P=0.158N        | 
|POLY 1.5           |                  P=0.117N                 P=0.421N                 P=0.198                  P=0.210N        | 
|POLY 6             |                  P=0.089N                 P=0.317N                 P=0.158                  P=0.144N        | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.235N                 P=0.800N                 P=0.315                  P=0.471N        | 
|ORDER RESTRICTED   |                  P=0.101N                 (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
                                                                                                                                   
       Date:  03/03/04                           EXPERIMENT: 96020 TEST: 01                                            Page 9       
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -     TEF EVALUATION (BINARY MIXTURE; PCB 126         
                                         Terminal Sacrifice at 143 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Mammary Gland                                                                                                                    | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  4/8 (50%)                0/2 (0%)                 1/5 (20%)                0/9 (0%)        | 
|POLY-3 RATE (b)    |                  4/4.20                   0/0.10                   1/1.20                   0/0.44          | 
|POLY-3 PERCENT (g) |                  95.3%                    0.0%                     83.6%                    0.0%            | 
|INT SACRIFICE 1 (c)|                  4/8 (50%)                0/2 (0%)                 1/5 (20%)                0/9 (0%)        | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  366 (I)                  ---                      366 (I)                  ---             | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.064N                 P=0.323N                 P=0.317N                 P=0.036N*       | 
|POLY 3             |                  P=0.014N*                P=0.110N                 P=0.187N                 P=0.003N**      | 
|POLY 1.5           |                  P=0.018N*                P=0.140N                 P=0.211N                 P=0.004N**      | 
|POLY 6             |                  P=0.014N*                P=0.103N                 P=0.181N                 P=0.002N**      | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.060N                 P=0.333N                 P=0.315N                 P=0.029N*       | 
|ORDER RESTRICTED   |                  P=0.013N*                (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Ovary                                                                                                                            | 
|     Atrophy                                                                                                                     | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  7/8 (88%)                8/10 (80%)               7/8 (88%)                8/9 (89%)       | 
|POLY-3 RATE (b)    |                  7/7.05                   8/8.10                   7/7.05                   8/8.05          | 
|POLY-3 PERCENT (g) |                  99.3%                    98.8%                    99.3%                    99.4%           | 
|INT SACRIFICE 1 (c)|                  7/8 (87.5%)              8/10 (80%)               7/8 (87.5%)              8/9 (88.9%)     | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  366 (I)                  366 (I)                  366 (I)                  366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.576                  P=0.582N                 P=0.768                  P=0.741         | 
|POLY 3             |                  P=0.554                  P=0.545N                 P=0.735                  P=0.709         | 
|POLY 1.5           |                  P=0.557                  P=0.551N                 P=0.739                  P=0.713         | 
|POLY 6             |                  P=0.554                  P=0.545N                 P=0.735                  P=0.709         | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.577                  P=0.588N                 P=0.767N                 P=0.735         | 
|ORDER RESTRICTED   |                  P=0.589                  (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
                                                                                                                                   
       Date:  03/03/04                           EXPERIMENT: 96020 TEST: 01                                            Page 10      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -     TEF EVALUATION (BINARY MIXTURE; PCB 126         
                                         Terminal Sacrifice at 143 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Pancreas: Acinus                                                                                                                 | 
|     Vacuolization Cytoplasmic                                                                                                   | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  0/8 (0%)                 0/10 (0%)                0/8 (0%)                 6/9 (67%)       | 
|POLY-3 RATE (b)    |                  0/0.39                   0/0.49                   0/0.39                   6/6.15          | 
|POLY-3 PERCENT (g) |                  0.0%                     0.0%                     0.0%                     97.6%           | 
|INT SACRIFICE 1 (c)|                  0/8 (0%)                 0/10 (0%)                0/8 (0%)                 6/9 (66.7%)     | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  ---                      ---                      ---                      366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P<0.001 **               (e)                      (e)                      P=0.011 *       | 
|POLY 3             |                  P<0.001 **               (e)                      (e)                      P<0.001 **      | 
|POLY 1.5           |                  P<0.001 **               (e)                      (e)                      P<0.001 **      | 
|POLY 6             |                  P<0.001 **               (e)                      (e)                      P<0.001 **      | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P<0.001 **               (e)                      (e)                      P=0.007 **      | 
|ORDER RESTRICTED   |                  P=0.026 *                (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Spleen                                                                                                                           | 
|     Pigmentation                                                                                                                | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  8/8 (100%)               0/0 (0%)                 0/0 (0%)                 9/9 (100%)      | 
|POLY-3 RATE (b)    |                  8/8.00                   0/0.00                   0/0.00                   9/9.00          | 
|POLY-3 PERCENT (g) |                  100.0%                   0.0%                     0.0%                     100.0%          | 
|INT SACRIFICE 1 (c)|                  8/8 (100%)               0/0 (0%)                 0/0 (0%)                 9/9 (100%)      | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  366 (I)                  ---                      ---                      366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  (e)                      (e)                      (e)                      (e)             | 
|POLY 3             |                  (e)                      (e)                      (e)                      (e)             | 
|POLY 1.5           |                  (e)                      (e)                      (e)                      (e)             | 
|POLY 6             |                  (e)                      (e)                      (e)                      (e)             | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  (e)                      (e)                      (e)                      (e)             | 
|ORDER RESTRICTED   |                  (e)                      (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
                                                                                                                                   
       Date:  03/03/04                           EXPERIMENT: 96020 TEST: 01                                            Page 11      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -     TEF EVALUATION (BINARY MIXTURE; PCB 126         
                                         Terminal Sacrifice at 143 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Thymus                                                                                                                           | 
|     Atrophy                                                                                                                     | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  5/8 (63%)                10/10 (100%)             8/8 (100%)               9/9 (100%)      | 
|POLY-3 RATE (b)    |                  5/5.15                   10/10.00                 8/8.00                   9/9.00          | 
|POLY-3 PERCENT (g) |                  97.1%                    100.0%                   100.0%                   100.0%          | 
|INT SACRIFICE 1 (c)|                  5/8 (62.5%)              10/10 (100%)             8/8 (100%)               9/9 (100%)      | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  366 (I)                  366 (I)                  366 (I)                  366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.276                  P=0.074                  P=0.107                  P=0.089         | 
|POLY 3             |                  P=0.249                  P=0.036 *                P=0.062                  P=0.047 *       | 
|POLY 1.5           |                  P=0.248                  P=0.039 *                P=0.067                  P=0.051         | 
|POLY 6             |                  P=0.252                  P=0.036 *                P=0.062                  P=0.047 *       | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.273                  P=0.069                  P=0.100                  P=0.082         | 
|ORDER RESTRICTED   |                  P<0.001 **               (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Thyroid Gland: C-Cell                                                                                                            | 
|     Hyperplasia                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  2/8 (25%)                0/10 (0%)                0/8 (0%)                 1/9 (11%)       | 
|POLY-3 RATE (b)    |                  2/2.30                   0/0.49                   0/0.39                   1/1.39          | 
|POLY-3 PERCENT (g) |                  87.1%                    0.0%                     0.0%                     71.8%           | 
|INT SACRIFICE 1 (c)|                  2/8 (25%)                0/10 (0%)                0/8 (0%)                 1/9 (11.1%)     | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  366 (I)                  ---                      ---                      366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.674                  P=0.185N                 P=0.232N                 P=0.457N        | 
|POLY 3             |                  P=0.461                  P=0.047N*                P=0.069N                 P=0.274N        | 
|POLY 1.5           |                  P=0.500                  P=0.066N                 P=0.093N                 P=0.308N        | 
|POLY 6             |                  P=0.452                  P=0.043N*                P=0.064N                 P=0.264N        | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.677                  P=0.183N                 P=0.233N                 P=0.453N        | 
|ORDER RESTRICTED   |                  P=0.072N                 (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
                                                                                                                                   
       Date:  03/03/04                           EXPERIMENT: 96020 TEST: 01                                            Page 12      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -     TEF EVALUATION (BINARY MIXTURE; PCB 126         
                                         Terminal Sacrifice at 143 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Thyroid Gland: Follicular Cell                                                                                                   | 
|     Hypertrophy                                                                                                                 | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  0/8 (0%)                 7/10 (70%)               6/8 (75%)                6/9 (67%)       | 
|POLY-3 RATE (b)    |                  0/0.39                   7/7.15                   6/6.10                   6/6.15          | 
|POLY-3 PERCENT (g) |                  0.0%                     97.9%                    98.4%                    97.6%           | 
|INT SACRIFICE 1 (c)|                  0/8 (0%)                 7/10 (70%)               6/8 (75%)                6/9 (66.7%)     | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  ---                      366 (I)                  366 (I)                  366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.241                  P=0.007 **               P=0.006 **               P=0.011 *       | 
|POLY 3             |                  P=0.170                  P<0.001 **               P<0.001 **               P<0.001 **      | 
|POLY 1.5           |                  P=0.175                  P<0.001 **               P<0.001 **               P<0.001 **      | 
|POLY 6             |                  P=0.171                  P<0.001 **               P<0.001 **               P<0.001 **      | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.238                  P=0.004 **               P=0.003 **               P=0.007 **      | 
|ORDER RESTRICTED   |                  P<0.001 **               (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Uterus                                                                                                                           | 
|     Inflammation                                                                                                                | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  0/8 (0%)                 0/10 (0%)                0/8 (0%)                 6/9 (67%)       | 
|POLY-3 RATE (b)    |                  0/0.39                   0/0.49                   0/0.39                   6/6.15          | 
|POLY-3 PERCENT (g) |                  0.0%                     0.0%                     0.0%                     97.6%           | 
|INT SACRIFICE 1 (c)|                  0/8 (0%)                 0/10 (0%)                0/8 (0%)                 6/9 (66.7%)     | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  ---                      ---                      ---                      366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P<0.001 **               (e)                      (e)                      P=0.011 *       | 
|POLY 3             |                  P<0.001 **               (e)                      (e)                      P<0.001 **      | 
|POLY 1.5           |                  P<0.001 **               (e)                      (e)                      P<0.001 **      | 
|POLY 6             |                  P<0.001 **               (e)                      (e)                      P<0.001 **      | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P<0.001 **               (e)                      (e)                      P=0.007 **      | 
|ORDER RESTRICTED   |                  P=0.026 *                (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
                                                                                                                                   
       Date:  03/03/04                           EXPERIMENT: 96020 TEST: 01                                            Page 13      
Statistical Analysis of Non-neoplastic Lesions in       Rats(SPRAGUE-DAWLEY)  -     TEF EVALUATION (BINARY MIXTURE; PCB 126         
                                         Terminal Sacrifice at 143 weeks                                                            
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Uterus                                                                                                                           | 
|     Metaplasia                                                                                                                  | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  7/8 (88%)                9/10 (90%)               7/8 (88%)                7/9 (78%)       | 
|POLY-3 RATE (b)    |                  7/7.05                   9/9.05                   7/7.05                   7/7.10          | 
|POLY-3 PERCENT (g) |                  99.3%                    99.5%                    99.3%                    98.6%           | 
|INT SACRIFICE 1 (c)|                  7/8 (87.5%)              9/10 (90%)               7/8 (87.5%)              7/9 (77.8%)     | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  366 (I)                  366 (I)                  366 (I)                  366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.395N                 P=0.716                  P=0.768                  P=0.543N        | 
|POLY 3             |                  P=0.363N                 P=0.685                  P=0.735                  P=0.504N        | 
|POLY 1.5           |                  P=0.369N                 P=0.689                  P=0.739                  P=0.511N        | 
|POLY 6             |                  P=0.362N                 P=0.685                  P=0.735                  P=0.503N        | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.393N                 P=0.706                  P=0.767N                 P=0.547N        | 
|ORDER RESTRICTED   |                  P=0.419N                 (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
|                   |                                                                                                             | 
|                   |                                                      Females                                                | 
|Dose               |                  0 NG /                   300 NG /                 300 NG /                 300 NG /        | 
|                   |                  0 UG                     100 UG                   300 UG                   3000 UG         | 
|=================================================================================================================================| 
|                                                                                                                                 | 
|Uterus: Endometrium                                                                                                              | 
|     Hyperplasia Cystic                                                                                                          | 
|                                                                                                                                 | 
|                                                                                                                                 | 
|---------------------------------------------------------------------------------------------------------------------------------| 
|LESION RATES       |                                                                                                             | 
|-----------        |                                                                                                             | 
|OVERALL (a)        |                  5/8 (63%)                0/10 (0%)                0/8 (0%)                 2/9 (22%)       | 
|POLY-3 RATE (b)    |                  5/5.15                   0/0.49                   0/0.39                   2/2.34          | 
|POLY-3 PERCENT (g) |                  97.1%                    0.0%                     0.0%                     85.3%           | 
|INT SACRIFICE 1 (c)|                  5/8 (62.5%)              0/10 (0%)                0/8 (0%)                 2/9 (22.2%)     | 
|TERMINAL (d)       |                  0/0 (0%)                 0/0 (0%)                 0/0 (0%)                 0/0 (0%)        | 
|FIRST INCIDENCE    |                  366 (I)                  ---                      ---                      366 (I)         | 
|-------------------|                                                                                                             | 
|STATISTICAL TESTS  |                                                                                                             | 
|-------------------|                                                                                                             | 
|LIFE TABLE         |                  P=0.663N                 P=0.010N*                P=0.018N*                P=0.124N        | 
|POLY 3             |                  P=0.539N                 P<0.001N**               P<0.001N**               P=0.058N        | 
|POLY 1.5           |                  P=0.566N                 P<0.001N**               P<0.001N**               P=0.068N        | 
|POLY 6             |                  P=0.531N                 P<0.001N**               P<0.001N**               P=0.056N        | 
|LOGISTIC REGRESSION|                  (e)                      (e)                      (e)                      (e)             | 
|COCH-ARM / FISHERS |                  P=0.665N                 P=0.007N**               P=0.013N*                P=0.117N        | 
|ORDER RESTRICTED   |                  P<0.001N**               (e)                      (e)                      (e)             | 
|=================================================================================================================================| 
                                                                                                                                   
(a)  Number of tumor-bearing animals /  number of animals examined at site.                                                         
(b)  Number of tumor-bearing animals / Poly-3 number                                                                                
(d)  Observed incidence at terminal kill.                                                                                           
(f)  Beneath the control incidence are the P-values associated with the trend                                                       
test.  Beneath the dosed group incidence are the P-values corresponding to                                                          
pairwise comparisons between the controls and that dosed group.  The life                                                           
table analysis regards tumors in animals dying prior to  terminal kill as                                                           
 being (directly or indirectly) the cause of death.                                                                                 
Logistic regression is an alternative                                                                                               
 method for analyzing the incidence of non-fatal tumors. The Cochran-Armitage                                                       
and Fishers exact tests compare directly the overall incidence rates                                                                
For all tests a negative trend is indicated by N                                                                                    
(e)  Value of Statistic cannot be computed.                                                                                         
(g)  Poly-3 adjusted lifetime tumor incidence.                                                                                      
(I)  Interim sacrifice                                                                                                              
(T)  Terminal sacrifice                                                                                                             
#   Tumor rates based on number of animals necropsied.                                                                              
*   To the right of any statistical result, indicates significance at (P<=0.05).                                                    
**  To the right of any statistical result, indicates significance at (P<=0.01).                                                    
NTP is located at the National Institute of Environmental Health Sciences, part of the National Institutes of Health.